There is a risk of a "deadly collision between urbanisation and climate change" if no action is taken to curb emissions, a UN report warns.

Japanese PM vows to redouble efforts to tackle damage at a nuclear plant where radioactive water has leaked creating a "maximum alert".

China remains the world's leading powerhouse in low-carbon energy technology as global investment in the sector reaches a new high of $243bn, a study shows.

Old World monkeys have better numerical skills than previously thought, scientists find.